1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b4e83620c86bfde23d229a5c103e64751b6d64048e4ba77b9158a859d314b2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3229259-3aa4-4147-80b5-280cb9fbd4c0.json and https://artists.proofprofile.net/proofs/artist/e3229259-3aa4-4147-80b5-280cb9fbd4c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13e27e801b3f800ea66c8b11f63b0845121b7717ec7be1d44d315fb61fc4f03. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff64c2a7ba01c42e03501cbcd3f0219aa86ee158b151118f7b8b353623607d3a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bb386cc5284998eafed52e00ba8fe4ebb97b3892446ac554094a9384302db9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dcb4c5f0dbbb2e5cd7fa95f5d6da9ba90f19c1b824aabd28288aad8f77275f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aea13da28d9bfd15d756c88991837f8495b9dd6136b519cb2bf64ebe5cd7b5e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721af5aa1ffe5c5d25a0cca7e8f4e57d7e28504235d46aba96c39b3d7a2697cd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d24eb386aebb74e225b1abc8bbed52e8adde2c7b4e92abcd7f53772108e46f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e4335ed9bd6d53439472e6f0577bff9349ceb10a51607e3daeeca2094371b0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d0f2d8f5f35fa8ff340791fa5776d01bc7ec47687e5bf4f29ac2c2c1a533bc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e42e3907b642c0b5481086e33ce641c439e8fe181a66fab6384a3e5a04e7ff0. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ792565519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b4a7e9a2be1d6f851c26e086c611898c9c6081dbe100816031d46701dc305e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2583624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e538f3941d6fde3c8c9ae68b27cdc71e1429e3e26960f6ceb161932c804997. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2583625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760021125eac942a15b680172e2066f6439c5ffb166a591849d3c82cc27888b9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2583626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df1c2a6331fbf749a2fab5750e3408d7e89310cd1b3f7b94011dc7b4a014c75. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2583627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80297423648e700466a118651d9fcbae148f0f99c8eba2cde08fef88b9253e91. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2583628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dd24bae6f106cfec02d319c11f127d0b6ec2c3ec404b6dabc8aba337ee7361. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2583629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f14c1116160fcbaaa2cec6535bf331f2ae2c1547ca3a2ef16754b814c5a75. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2583630.